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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_4e915715b3a82baafd590bbd135ded06.html">preprocessing</a></li>  </ul>
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<div class="title">sharder.hpp</div>  </div>
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<a href="sharder_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#ifndef GRAPHCHI_SHARDER_DEF</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define GRAPHCHI_SHARDER_DEF</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor">#include &lt;fcntl.h&gt;</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#include &lt;unistd.h&gt;</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor">#include &lt;omp.h&gt;</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#include &lt;errno.h&gt;</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="preprocessor">#include &lt;sstream&gt;</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="preprocessor">#include &quot;graphchi_types.hpp&quot;</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="chifilenames_8hpp.html">api/chifilenames.hpp</a>&quot;</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="graphchi__context_8hpp.html">api/graphchi_context.hpp</a>&quot;</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="stripedio_8hpp.html">io/stripedio.hpp</a>&quot;</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="slidingshard_8hpp.html">shards/slidingshard.hpp</a>&quot;</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="memoryshard_8hpp.html">shards/memoryshard.hpp</a>&quot;</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="logger_8hpp.html">logger/logger.hpp</a>&quot;</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="ioutil_8hpp.html">util/ioutil.hpp</a>&quot;</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="preprocessor">#include &quot;util/qsort.hpp&quot;</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="metrics_8hpp.html">metrics/metrics.hpp</a>&quot;</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="reps_2basic__reporter_8hpp.html">metrics/reps/basic_reporter.hpp</a>&quot;</span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="keyword">namespace </span>graphchi {</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    </div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="preprocessor">#define SHARDER_BUFSIZE (64 * 1024 * 1024)</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="preprocessor"></span>  </div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keyword">enum</span> ProcPhase  { COMPUTE_INTERVALS=1, SHOVEL=2 };</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    </div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> EdgeDataType&gt;</div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="code" href="structgraphchi_1_1edge__with__value.html">   69</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="structgraphchi_1_1edge__with__value.html">edge_with_value</a> {</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        vid_t src;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;        vid_t dst;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        EdgeDataType value;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;        </div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;        <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_with_value</a>(vid_t src, vid_t dst, EdgeDataType value) : src(src), dst(dst), value(value) {}</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        </div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        <span class="keywordtype">bool</span> stopper() { <span class="keywordflow">return</span> src == 0 &amp;&amp; dst == 0; }</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    };</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    </div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> EdgeDataType&gt;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    <span class="keywordtype">bool</span> edge_t_src_less(<span class="keyword">const</span> <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_with_value&lt;EdgeDataType&gt;</a> &amp;a, <span class="keyword">const</span> <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_with_value&lt;EdgeDataType&gt;</a> &amp;b) {</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        <span class="keywordflow">if</span> (a.src == b.src) <span class="keywordflow">return</span> a.dst &lt; b.dst;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        <span class="keywordflow">return</span> a.src &lt; b.src;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    }</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    </div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> EdgeDataType&gt;</div>
<div class="line"><a name="l00086"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html">   86</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1sharder.html">sharder</a> {</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        </div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <span class="keyword">typedef</span> <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_with_value&lt;EdgeDataType&gt;</a> <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;        </div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        std::string basefilename;</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        </div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        <span class="keywordtype">int</span> binfile_fd;</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        vid_t max_vertex_id;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        </div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        <span class="comment">/* Preprocessing */</span></div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        <span class="keywordtype">char</span> * prebuf; </div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        <span class="keywordtype">char</span> * prebufptr;  </div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        </div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;        <span class="keywordtype">size_t</span> bytes_preprocessed;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;        </div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        <span class="comment">/* Sharding */</span></div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        <span class="keywordtype">int</span> nshards;</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        std::vector&lt; std::pair&lt;vid_t, vid_t&gt; &gt; intervals;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        <span class="keywordtype">int</span> phase;</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        </div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        <span class="keywordtype">int</span> * edgecounts;</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;        <span class="keywordtype">int</span> vertexchunk;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;        <span class="keywordtype">size_t</span> nedges;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        std::string prefix;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        </div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;        <span class="keywordtype">int</span> * shovelfs;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;        </div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;        <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a> ** bufs;</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;        <span class="keywordtype">int</span> * bufptrs;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;        <span class="keywordtype">size_t</span> bufsize;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;        <span class="keywordtype">size_t</span> edgedatasize;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;        </div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;        <a class="code" href="classgraphchi_1_1metrics.html">metrics</a> m;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;        </div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;        </div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;        <a class="code" href="classgraphchi_1_1sharder.html">sharder</a>(std::string basefilename) : basefilename(basefilename), m(<span class="stringliteral">&quot;sharder&quot;</span>) {</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            binfile_fd = (-1);</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;            prebuf = NULL;</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;            bufs = NULL;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;            edgedatasize = <span class="keyword">sizeof</span>(EdgeDataType);</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;        }</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;        </div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;        </div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;        <span class="keyword">virtual</span> ~<a class="code" href="classgraphchi_1_1sharder.html">sharder</a>() {</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;            <span class="keywordflow">if</span> (prebuf != NULL) free(prebuf);</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;            prebuf = NULL;</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;        }</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;        </div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;        std::string preprocessed_name() {</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;            std::stringstream ss;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            ss &lt;&lt; basefilename;</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            ss &lt;&lt; <span class="stringliteral">&quot;.&quot;</span> &lt;&lt;  <span class="keyword">sizeof</span>(EdgeDataType) &lt;&lt; <span class="stringliteral">&quot;B.bin&quot;</span>;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;            <span class="keywordflow">return</span> ss.str();</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;        }</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;        </div>
<div class="line"><a name="l00147"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#a9473263ad2cfc83c11100e7cf253e10c">  147</a></span>&#160;        <span class="keywordtype">bool</span> <a class="code" href="classgraphchi_1_1sharder.html#a9473263ad2cfc83c11100e7cf253e10c">preprocessed_file_exists</a>() {</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;            <span class="keywordtype">int</span> f = open(preprocessed_name().c_str(), O_RDONLY);</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;            <span class="keywordflow">if</span> (f &gt;= 0) {</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;                close(f);</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;                <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;                <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;            }</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;        }</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;        </div>
<div class="line"><a name="l00160"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#ac867bb6b0f8e420f790b60f2c18f2a6b">  160</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1sharder.html#ac867bb6b0f8e420f790b60f2c18f2a6b">start_preprocessing</a>() {</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;            <span class="keywordflow">if</span> (prebuf != NULL) {</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#ac2164369b4d2bf72296f8ba6ea576ecf">LOG_FATAL</a>) &lt;&lt; <span class="stringliteral">&quot;start_preprocessing() already called! Aborting.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            }   </div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;            </div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;            m.start_time(<span class="stringliteral">&quot;preprocessing&quot;</span>);</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;            assert(prebuf == NULL); </div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;            std::string tmpfilename = preprocessed_name() + <span class="stringliteral">&quot;.tmp&quot;</span>;</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;            binfile_fd = open(tmpfilename.c_str(), O_WRONLY | O_CREAT, S_IROTH | S_IWOTH | S_IWUSR | S_IRUSR);</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;            <span class="keywordflow">if</span> (binfile_fd &lt; 0) {</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not create file: &quot;</span> &lt;&lt; tmpfilename &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;            }</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;            assert(binfile_fd &gt;= 0);</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;            </div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;            <span class="comment">/* Initialize buffers */</span></div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;            prebuf = (<span class="keywordtype">char</span>*) malloc(SHARDER_BUFSIZE); </div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;            prebufptr = prebuf;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;            assert(prebuf != NULL);</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;            </div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Started preprocessing: &quot;</span> &lt;&lt; basefilename &lt;&lt; <span class="stringliteral">&quot; --&gt; &quot;</span> &lt;&lt; tmpfilename &lt;&lt; std::endl;</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;            </div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;            <span class="comment">/* Write the maximum vertex id place holder - to be filled later */</span></div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;            <a class="code" href="classgraphchi_1_1sharder.html#ae57e42f648104bf6b6ee23d7cf957696">bwrite</a>(binfile_fd, prebuf, prebufptr, (vid_t)0);</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;            max_vertex_id = 0;</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;            bytes_preprocessed = 0;</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;        }</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;        </div>
<div class="line"><a name="l00190"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#aebb6e75ba00e4f4016b9559e45254142">  190</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1sharder.html#aebb6e75ba00e4f4016b9559e45254142">end_preprocessing</a>() {</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;            assert(prebuf != NULL);</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;            </div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;            <span class="comment">/* Flush buffer to disk */</span></div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;            writea(binfile_fd, prebuf, prebufptr - prebuf);</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;            bytes_preprocessed += prebufptr - prebuf;</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Preprocessed: &quot;</span> &lt;&lt; float(bytes_preprocessed / 1024. / 1024.) &lt;&lt; <span class="stringliteral">&quot; MB.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;            </div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;            <span class="comment">/* Write the max vertex id byte */</span></div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;            assert(max_vertex_id &gt; 0);</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Maximum vertex id: &quot;</span> &lt;&lt; max_vertex_id &lt;&lt; std::endl;</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;            ssize_t written = pwrite(binfile_fd, &amp;max_vertex_id, <span class="keyword">sizeof</span>(vid_t), 0);</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;            <span class="keywordflow">if</span> (written != <span class="keyword">sizeof</span>(vid_t)) {</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Error when writing preprocessed file: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;            }</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;            assert(written == <span class="keyword">sizeof</span>(vid_t));</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;            </div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;            <span class="comment">/* Free buffer&#39;s memory */</span></div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;            free(prebuf);</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;            prebuf = NULL;</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;            prebufptr = NULL;</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;            </div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;            <span class="comment">/* Rename temporary file */</span> </div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;            std::string tmpfilename = preprocessed_name() + <span class="stringliteral">&quot;.tmp&quot;</span>;</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;            rename(tmpfilename.c_str(), preprocessed_name().c_str());</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;            </div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;            assert(<a class="code" href="classgraphchi_1_1sharder.html#a9473263ad2cfc83c11100e7cf253e10c">preprocessed_file_exists</a>());</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;                     logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Finished preprocessing: &quot;</span> &lt;&lt; basefilename &lt;&lt; <span class="stringliteral">&quot; --&gt; &quot;</span> &lt;&lt; preprocessed_name() &lt;&lt; std::endl;</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;            m.stop_time(<span class="stringliteral">&quot;preprocessing&quot;</span>);</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;        }</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;        </div>
<div class="line"><a name="l00224"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#ad902ff8fdee18b7eb5193fabd25d8d49">  224</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1sharder.html#ad902ff8fdee18b7eb5193fabd25d8d49">preprocessing_add_edge</a>(vid_t from, vid_t to, EdgeDataType val) {</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;            <span class="keywordflow">if</span> (prebuf == NULL) {</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#ac2164369b4d2bf72296f8ba6ea576ecf">LOG_FATAL</a>) &lt;&lt; <span class="stringliteral">&quot;You need to call start_preprocessing() prior to adding any edges!&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;            }</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;            assert(prebuf != NULL);</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;            </div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;            <a class="code" href="classgraphchi_1_1sharder.html#ae57e42f648104bf6b6ee23d7cf957696">bwrite</a>(binfile_fd, prebuf, prebufptr, <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>(from, to, val)); </div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;            max_vertex_id = std::max(std::max(from, to), max_vertex_id);</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;        }</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        </div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;        <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00236"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#ae57e42f648104bf6b6ee23d7cf957696">  236</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1sharder.html#ae57e42f648104bf6b6ee23d7cf957696">bwrite</a>(<span class="keywordtype">int</span> f, <span class="keywordtype">char</span> * buf, <span class="keywordtype">char</span> * &amp;bufptr, T val) {</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;            <span class="keywordflow">if</span> (bufptr + <span class="keyword">sizeof</span>(T) - buf &gt;= SHARDER_BUFSIZE) {</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;                writea(f, buf, bufptr - buf);</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;                bufptr = buf;</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;                </div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;                <span class="keywordflow">if</span> (buf == prebuf) { <span class="comment">// Slightly ugly.</span></div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;                    bytes_preprocessed += SHARDER_BUFSIZE;</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>)&lt;&lt; <span class="stringliteral">&quot;Preprocessed: &quot;</span> &lt;&lt; float(bytes_preprocessed / 1024. / 1024.) &lt;&lt; <span class="stringliteral">&quot; MB.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;                }</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;            }</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;            *((T*)bufptr) = val;</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;            bufptr += <span class="keyword">sizeof</span>(T);</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        }</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;        </div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;        </div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;      </div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;        </div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;        </div>
<div class="line"><a name="l00258"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#a8c1af4eca3037578aa7bd5b7cc431c8c">  258</a></span>&#160;        <span class="keywordtype">int</span> <a class="code" href="classgraphchi_1_1sharder.html#a8c1af4eca3037578aa7bd5b7cc431c8c">execute_sharding</a>(std::string nshards_string) {</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;            m.start_time(<span class="stringliteral">&quot;execute_sharding&quot;</span>);</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;            <a class="code" href="classgraphchi_1_1sharder.html#ab30874a25a6acd970085966ee2f12a3d">determine_number_of_shards</a>(nshards_string);</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;          </div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;            <span class="keywordtype">size_t</span> blocksize = 32 * 1024 * 1024;</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;            <span class="keywordflow">while</span> (blocksize % <span class="keyword">sizeof</span>(<a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>)) blocksize++;</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;            </div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;            <span class="keywordtype">char</span> * block = (<span class="keywordtype">char</span>*) malloc(blocksize);</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;            <span class="keywordtype">size_t</span> total_to_process = get_filesize(preprocessed_name());</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> phase=1; phase &lt;= 2; ++phase) {</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;                <span class="comment">/* Start the sharing process */</span></div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;                FILE * inf = fopen(preprocessed_name().c_str(), <span class="stringliteral">&quot;r&quot;</span>);</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;                <span class="keywordflow">if</span> (inf == NULL) {</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#ac2164369b4d2bf72296f8ba6ea576ecf">LOG_FATAL</a>) &lt;&lt; <span class="stringliteral">&quot;Could not open preprocessed file: &quot;</span> &lt;&lt; preprocessed_name() &lt;&lt; </div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;                    <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;                }</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;                assert(inf != NULL);</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;                </div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;                <span class="comment">/* Read max vertex id */</span></div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;                ssize_t rd = fread(&amp;max_vertex_id, <span class="keyword">sizeof</span>(vid_t), 1, inf);</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;                <span class="keywordflow">if</span> (rd != 1) {</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Read: &quot;</span> &lt;&lt; rd &lt;&lt; std::endl;</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not read from preprocessed file. Error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;                }</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;                assert(rd == 1);</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Max vertex id: &quot;</span> &lt;&lt; max_vertex_id &lt;&lt; std::endl; </div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;                </div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;                this-&gt;start_phase(phase);</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;                </div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;                <span class="keywordtype">size_t</span> totread = 0;</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;                <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;                    <span class="keywordtype">size_t</span> len = 0;</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;                    <span class="keywordflow">while</span>(len &lt; blocksize) {</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;                        <span class="keywordtype">int</span> a = (int) fread(block + len, 1, blocksize - len, inf);</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;                        len += a;</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;                        <span class="keywordflow">if</span> (a &lt;= 0) <span class="keywordflow">break</span>; <span class="comment">// eof</span></div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;                    }</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;                    totread += len;</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;                    </div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;                   logstream(<a class="code" href="logger_8hpp.html#a6ff63e8955665c4a58b1598f2b07c51a">LOG_DEBUG</a>) &lt;&lt; <span class="stringliteral">&quot;Phase: &quot;</span> &lt;&lt; phase &lt;&lt; <span class="stringliteral">&quot; read:&quot;</span> </div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;                            &lt;&lt; (totread * 1.0 / total_to_process * 100) &lt;&lt; <span class="stringliteral">&quot;%&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;                    len /= <span class="keyword">sizeof</span>(<a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>);</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;                    <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a> * ptr = (<a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>*)block;      </div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;                    </div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;                    <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0; i&lt;len; i++) {</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;                        this-&gt;receive_edge(ptr[i].src, ptr[i].dst, ptr[i].value);</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;                    }</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;                } <span class="keywordflow">while</span> (!feof(inf));</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;                this-&gt;end_phase();</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;                </div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;                fclose(inf);</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;            }</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;            </div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;            <span class="comment">/* Release memory */</span></div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;            free(block); </div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;            block = NULL;</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;            <span class="comment">/* Write the shards */</span></div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;            <a class="code" href="classgraphchi_1_1sharder.html#acba67408a81dfaa5fdac73c1d61f4631">write_shards</a>();</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;                      </div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;            m.stop_time(<span class="stringliteral">&quot;execute_sharding&quot;</span>);</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;            </div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;            <span class="comment">/* Print metrics */</span></div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;            <a class="code" href="classgraphchi_1_1basic__reporter.html">basic_reporter</a> basicrep;</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;            m.report(basicrep);</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;            </div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;            <span class="keywordflow">return</span> nshards;</div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;        }</div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;        </div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;    <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;</div>
<div class="line"><a name="l00333"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#ab30874a25a6acd970085966ee2f12a3d">  333</a></span>&#160;        <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1sharder.html#ab30874a25a6acd970085966ee2f12a3d">determine_number_of_shards</a>(std::string nshards_string) {</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;            assert(<a class="code" href="classgraphchi_1_1sharder.html#a9473263ad2cfc83c11100e7cf253e10c">preprocessed_file_exists</a>());</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;            <span class="keywordflow">if</span> (nshards_string.find(<span class="stringliteral">&quot;auto&quot;</span>) != std::string::npos || nshards_string == <span class="stringliteral">&quot;0&quot;</span>) {</div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Determining number of shards automatically.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;                </div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;                <span class="keywordtype">int</span> membudget_mb = get_option_int(<span class="stringliteral">&quot;membudget_mb&quot;</span>, 1024);</div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Assuming available memory is &quot;</span> &lt;&lt; membudget_mb &lt;&lt; <span class="stringliteral">&quot; megabytes. &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot; (This can be defined with configuration parameter &#39;membudget_mb&#39;)&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;                </div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;                bytes_preprocessed = get_filesize(preprocessed_name()) - <span class="keyword">sizeof</span>(vid_t);</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;                assert(bytes_preprocessed &gt; 0);</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;                <span class="keywordtype">size_t</span> numedges = bytes_preprocessed / <span class="keyword">sizeof</span>(<a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>);</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;                </div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;                <span class="keywordtype">double</span> max_shardsize = membudget_mb * 1024. * 1024. / 8;</div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Determining maximum shard size: &quot;</span> &lt;&lt; (max_shardsize / 1024. / 1024.) &lt;&lt; <span class="stringliteral">&quot; MB.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;                </div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;                nshards = (int) ( 2 + (numedges * <span class="keyword">sizeof</span>(EdgeDataType) / max_shardsize) + 0.5); </div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;                nshards = atoi(nshards_string.c_str());</div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;            }</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;            </div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Number of shards to be created: &quot;</span> &lt;&lt; nshards &lt;&lt; std::endl;</div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;            assert(nshards &gt; 1);</div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;        }</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;        </div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;        <span class="keywordtype">void</span> compute_partitionintervals() {</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;            <span class="keywordtype">size_t</span> edges_per_part = nedges / nshards + 1;</div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;            </div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt;  <span class="stringliteral">&quot;Number of shards: &quot;</span> &lt;&lt; nshards &lt;&lt; std::endl;</div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>)  &lt;&lt; <span class="stringliteral">&quot;Edges per shard: &quot;</span> &lt;&lt; edges_per_part &lt;&lt; std::endl;</div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>)  &lt;&lt; <span class="stringliteral">&quot;Max vertex id: &quot;</span> &lt;&lt; max_vertex_id &lt;&lt; std::endl;</div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;            </div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;            vid_t cur_st = 0;</div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;            <span class="keywordtype">size_t</span> edgecounter=0;</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;            std::string fname = filename_intervals(basefilename, nshards);</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;            FILE * f = fopen(fname.c_str(), <span class="stringliteral">&quot;w&quot;</span>);</div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;            </div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;            <span class="keywordflow">if</span> (f == NULL) {</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not open file: &quot;</span> &lt;&lt; fname &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt;</div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;                        strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;            }</div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;            assert(f != NULL);</div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;            </div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;            vid_t i = 0;</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;            <span class="keywordflow">while</span>(nshards &gt; (<span class="keywordtype">int</span>) intervals.size()) {</div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;                i += vertexchunk;</div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;                edgecounter += edgecounts[i / vertexchunk];</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;                <span class="keywordflow">if</span> (edgecounter &gt;= edges_per_part || (i &gt;= max_vertex_id)) {</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;                    intervals.push_back(std::pair&lt;vid_t,vid_t&gt;(cur_st, i + (i &gt;= max_vertex_id)));</div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Interval: &quot;</span> &lt;&lt; cur_st &lt;&lt; <span class="stringliteral">&quot; - &quot;</span> &lt;&lt; i &lt;&lt; std::endl;</div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;                    fprintf(f, <span class="stringliteral">&quot;%u\n&quot;</span>, i + (i == max_vertex_id));</div>
<div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;                    cur_st = i + 1;</div>
<div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;                    edgecounter = 0;</div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;                }</div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;            }</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;            fclose(f);</div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;            assert(nshards == (<span class="keywordtype">int</span>)intervals.size());</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;            </div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Computed intervals.&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;        }</div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;        </div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;        std::string shovel_filename(<span class="keywordtype">int</span> shard) {</div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;            std::stringstream ss;</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;            ss &lt;&lt; basefilename &lt;&lt; shard &lt;&lt; <span class="stringliteral">&quot;.&quot;</span> &lt;&lt; nshards &lt;&lt; <span class="stringliteral">&quot;.shovel&quot;</span>;</div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;            <span class="keywordflow">return</span> ss.str(); </div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;        }</div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;        </div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;        <span class="keywordtype">void</span> start_phase(<span class="keywordtype">int</span> p) {</div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;            phase = p;</div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;            lastpart = 0;</div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Starting phase: &quot;</span> &lt;&lt; phase &lt;&lt; std::endl;</div>
<div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;            <span class="keywordflow">switch</span> (phase) {</div>
<div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;                <span class="keywordflow">case</span> COMPUTE_INTERVALS:</div>
<div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;                    <span class="comment">/* To compute the intervals, we need to keep track of the vertex degrees.</span></div>
<div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;<span class="comment">                       If there is not enough memory to store degree for each vertex, we combine</span></div>
<div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;<span class="comment">                       degrees of successive vertice. This results into less accurate shard split,</span></div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;<span class="comment">                       but in practice it hardly matters. */</span></div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;                    vertexchunk = (int) (max_vertex_id * <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) / (1024 * 1024 * get_option_long(<span class="stringliteral">&quot;membudget_mb&quot;</span>, 1024)));</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;                    <span class="keywordflow">if</span> (vertexchunk&lt;1) vertexchunk = 1;                    </div>
<div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;                    edgecounts = (<span class="keywordtype">int</span>*)calloc( max_vertex_id / vertexchunk + 1, <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>));</div>
<div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;                    nedges = 0;</div>
<div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;                    <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;                    </div>
<div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;                <span class="keywordflow">case</span> SHOVEL:</div>
<div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;                    shovelfs = <span class="keyword">new</span> <span class="keywordtype">int</span>[nshards];</div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;                    bufs = <span class="keyword">new</span> edge_t*[nshards];</div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;                    bufptrs =  <span class="keyword">new</span> <span class="keywordtype">int</span>[nshards];</div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;                    bufsize = (1024 * 1024 * get_option_long(<span class="stringliteral">&quot;membudget_mb&quot;</span>, 1024)) / nshards / 4;</div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;                    <span class="keywordflow">while</span>(bufsize % <span class="keyword">sizeof</span>(edge_t) != 0) bufsize++;</div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;                    </div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#a6ff63e8955665c4a58b1598f2b07c51a">LOG_DEBUG</a>)&lt;&lt; <span class="stringliteral">&quot;Shoveling bufsize: &quot;</span> &lt;&lt; bufsize &lt;&lt; std::endl;</div>
<div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;                  </div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;                    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; nshards; i++) {</div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;                        std::string fname = shovel_filename(i);</div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;                        shovelfs[i] = open(fname.c_str(), O_WRONLY | O_CREAT, S_IROTH | S_IWOTH | S_IWUSR | S_IRUSR);</div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;                        <span class="keywordflow">if</span> (shovelfs[i] &lt; 0) {</div>
<div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;                            logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not create a temporary file &quot;</span> &lt;&lt; fname &lt;&lt;</div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;                            <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;                        }</div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;                        assert(shovelfs[i] &gt;= 0);</div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;                        bufs[i] = (edge_t*) malloc(bufsize);</div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;                        bufptrs[i] = 0;</div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;                    }</div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;                    <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;            }</div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;        }</div>
<div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;        </div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;        <span class="keywordtype">void</span> end_phase() {</div>
<div class="line"><a name="l00441"></a><span class="lineno">  441</span>&#160;            logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Ending phase: &quot;</span> &lt;&lt; phase &lt;&lt; std::endl;</div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;            <span class="keywordflow">switch</span> (phase) {</div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;                <span class="keywordflow">case</span> COMPUTE_INTERVALS:</div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;                    compute_partitionintervals();</div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;                    free(edgecounts);</div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;                    edgecounts = NULL;</div>
<div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;                    <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;                <span class="keywordflow">case</span> SHOVEL:</div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;                    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;nshards; i++) {</div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;                        writea(shovelfs[i], bufs[i], <span class="keyword">sizeof</span>(edge_t) * (bufptrs[i]));</div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;                        close(shovelfs[i]);</div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;                        free(bufs[i]);</div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;                    }</div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;                    free(bufs);</div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;                    free(bufptrs);</div>
<div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;                    <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;            }    </div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;        }</div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;        </div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;        </div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;        <span class="keywordtype">int</span> lastpart;</div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;        </div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;        <span class="keywordtype">void</span> swrite(<span class="keywordtype">int</span> shard, edge_t et) {</div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;            bufs[shard][bufptrs[shard]++] = et;</div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;            <span class="keywordflow">if</span> (bufptrs[shard] * <span class="keyword">sizeof</span>(edge_t) &gt;= bufsize) {</div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;                writea(shovelfs[shard], bufs[shard], <span class="keyword">sizeof</span>(edge_t) * bufptrs[shard]);</div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;                bufptrs[shard] = 0;</div>
<div class="line"><a name="l00468"></a><span class="lineno">  468</span>&#160;            }</div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;            </div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;        }</div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;        </div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;        <span class="keywordtype">void</span> receive_edge(vid_t from, vid_t to, EdgeDataType value) {</div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;            <span class="keywordflow">if</span> (to == from) {</div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#adf4476a6a4ea6c74231c826e899d7189">LOG_WARNING</a>) &lt;&lt; <span class="stringliteral">&quot;Tried to add self-edge &quot;</span> &lt;&lt; from &lt;&lt; <span class="stringliteral">&quot;-&gt;&quot;</span> &lt;&lt; to &lt;&lt; std::endl;</div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;                <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00476"></a><span class="lineno">  476</span>&#160;            }</div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;            <span class="keywordflow">if</span> (from &gt; max_vertex_id || to &gt; max_vertex_id) {</div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Tried to add an edge with too large from/to values. From:&quot;</span> &lt;&lt; </div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;                    from &lt;&lt; <span class="stringliteral">&quot; to: &quot;</span>&lt;&lt; to &lt;&lt; <span class="stringliteral">&quot; max: &quot;</span> &lt;&lt; max_vertex_id &lt;&lt; std::endl;</div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;                assert(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;            }</div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;            <span class="keywordflow">switch</span> (phase) {</div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;                <span class="keywordflow">case</span> COMPUTE_INTERVALS:</div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;                    edgecounts[to / vertexchunk]++;</div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;                    nedges++;</div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;                    <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;                <span class="keywordflow">case</span> SHOVEL:</div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;                    <span class="keywordtype">bool</span> found=<span class="keyword">false</span>;</div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;                    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; nshards; i++) {</div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;                        <span class="keywordtype">int</span> shard = (lastpart + i) % nshards;</div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;                        <span class="keywordflow">if</span> (to &gt;= intervals[shard].first &amp;&amp; to &lt;= intervals[shard].second) {</div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;                            swrite(shard, edge_t(from, to, value));</div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;                            lastpart = shard;  <span class="comment">// Small optimizations, which works if edges are in order for each vertex - not much though</span></div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;                            found = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;                            <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;                        }</div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;                    }</div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;                    <span class="keywordflow">if</span>(!found) {</div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;                       logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Shard not found for : &quot;</span> &lt;&lt; to &lt;&lt; std::endl; </div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;                    }</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;                    assert(found);</div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;                    <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;            }</div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;        }</div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;        </div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;              </div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;        </div>
<div class="line"><a name="l00513"></a><span class="lineno"><a class="code" href="classgraphchi_1_1sharder.html#acba67408a81dfaa5fdac73c1d61f4631">  513</a></span>&#160;        <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1sharder.html#acba67408a81dfaa5fdac73c1d61f4631">write_shards</a>() {</div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> shard=0; shard &lt; nshards; shard++) {</div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Starting final processing for shard: &quot;</span> &lt;&lt; shard &lt;&lt; std::endl;</div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;                </div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;                std::string shovelfname = shovel_filename(shard);</div>
<div class="line"><a name="l00518"></a><span class="lineno">  518</span>&#160;                std::string fname = filename_shard_adj(basefilename, shard, nshards);</div>
<div class="line"><a name="l00519"></a><span class="lineno">  519</span>&#160;                std::string edfname = filename_shard_edata&lt;EdgeDataType&gt;(basefilename, shard, nshards);</div>
<div class="line"><a name="l00520"></a><span class="lineno">  520</span>&#160;                </div>
<div class="line"><a name="l00521"></a><span class="lineno">  521</span>&#160;                <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a> * shovelbuf;</div>
<div class="line"><a name="l00522"></a><span class="lineno">  522</span>&#160;                <span class="keywordtype">int</span> shovelf = open(shovelfname.c_str(), O_RDONLY);</div>
<div class="line"><a name="l00523"></a><span class="lineno">  523</span>&#160;                <span class="keywordtype">size_t</span> shovelsize = readfull(shovelf, (<span class="keywordtype">char</span>**) &amp;shovelbuf);</div>
<div class="line"><a name="l00524"></a><span class="lineno">  524</span>&#160;                <span class="keywordtype">size_t</span> numedges = shovelsize / <span class="keyword">sizeof</span>(<a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>);</div>
<div class="line"><a name="l00525"></a><span class="lineno">  525</span>&#160;                </div>
<div class="line"><a name="l00526"></a><span class="lineno">  526</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#a6ff63e8955665c4a58b1598f2b07c51a">LOG_DEBUG</a>) &lt;&lt; <span class="stringliteral">&quot;Shovel size:&quot;</span> &lt;&lt; shovelsize &lt;&lt; <span class="stringliteral">&quot; edges: &quot;</span> &lt;&lt; numedges &lt;&lt; std::endl;</div>
<div class="line"><a name="l00527"></a><span class="lineno">  527</span>&#160;                </div>
<div class="line"><a name="l00528"></a><span class="lineno">  528</span>&#160;                quickSort(shovelbuf, (<span class="keywordtype">int</span>)numedges, edge_t_src_less&lt;EdgeDataType&gt;);</div>
<div class="line"><a name="l00529"></a><span class="lineno">  529</span>&#160;               </div>
<div class="line"><a name="l00530"></a><span class="lineno">  530</span>&#160;                <span class="comment">// Create the final file</span></div>
<div class="line"><a name="l00531"></a><span class="lineno">  531</span>&#160;                <span class="keywordtype">int</span> f = open(fname.c_str(), O_WRONLY | O_CREAT, S_IROTH | S_IWOTH | S_IWUSR | S_IRUSR);</div>
<div class="line"><a name="l00532"></a><span class="lineno">  532</span>&#160;                <span class="keywordflow">if</span> (f &lt; 0) {</div>
<div class="line"><a name="l00533"></a><span class="lineno">  533</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not open &quot;</span> &lt;&lt; fname &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00534"></a><span class="lineno">  534</span>&#160;                }</div>
<div class="line"><a name="l00535"></a><span class="lineno">  535</span>&#160;                assert(f &gt;= 0);</div>
<div class="line"><a name="l00536"></a><span class="lineno">  536</span>&#160;                <span class="keywordtype">int</span> trerr = ftruncate(f, 0);</div>
<div class="line"><a name="l00537"></a><span class="lineno">  537</span>&#160;                assert(trerr == 0);</div>
<div class="line"><a name="l00538"></a><span class="lineno">  538</span>&#160;                </div>
<div class="line"><a name="l00539"></a><span class="lineno">  539</span>&#160;                <span class="comment">/* Create edge data file */</span></div>
<div class="line"><a name="l00540"></a><span class="lineno">  540</span>&#160;                <span class="keywordtype">int</span> ef = open(edfname.c_str(), O_WRONLY | O_CREAT, S_IROTH | S_IWOTH | S_IWUSR | S_IRUSR);</div>
<div class="line"><a name="l00541"></a><span class="lineno">  541</span>&#160;                <span class="keywordflow">if</span> (ef &lt; 0) {</div>
<div class="line"><a name="l00542"></a><span class="lineno">  542</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not open &quot;</span> &lt;&lt; edfname &lt;&lt; <span class="stringliteral">&quot; error: &quot;</span> &lt;&lt; strerror(errno) &lt;&lt; std::endl;</div>
<div class="line"><a name="l00543"></a><span class="lineno">  543</span>&#160;        </div>
<div class="line"><a name="l00544"></a><span class="lineno">  544</span>&#160;                }</div>
<div class="line"><a name="l00545"></a><span class="lineno">  545</span>&#160;                assert(ef &gt;= 0);</div>
<div class="line"><a name="l00546"></a><span class="lineno">  546</span>&#160;                </div>
<div class="line"><a name="l00547"></a><span class="lineno">  547</span>&#160;                <span class="keywordtype">char</span> * buf = (<span class="keywordtype">char</span>*) malloc(SHARDER_BUFSIZE); </div>
<div class="line"><a name="l00548"></a><span class="lineno">  548</span>&#160;                <span class="keywordtype">char</span> * bufptr = buf;</div>
<div class="line"><a name="l00549"></a><span class="lineno">  549</span>&#160;                <span class="keywordtype">char</span> * ebuf = (<span class="keywordtype">char</span>*) malloc(SHARDER_BUFSIZE);</div>
<div class="line"><a name="l00550"></a><span class="lineno">  550</span>&#160;                <span class="keywordtype">char</span> * ebufptr = ebuf;</div>
<div class="line"><a name="l00551"></a><span class="lineno">  551</span>&#160;                </div>
<div class="line"><a name="l00552"></a><span class="lineno">  552</span>&#160;                vid_t curvid=0;</div>
<div class="line"><a name="l00553"></a><span class="lineno">  553</span>&#160;                <span class="keywordtype">size_t</span> istart = 0;</div>
<div class="line"><a name="l00554"></a><span class="lineno">  554</span>&#160;                <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0; i &lt;= numedges; i++) {</div>
<div class="line"><a name="l00555"></a><span class="lineno">  555</span>&#160;                    <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a> <a class="code" href="structedge.html">edge</a> = (i &lt; numedges ? shovelbuf[i] : <a class="code" href="structgraphchi_1_1edge__with__value.html">edge_t</a>(0, 0, EdgeDataType())); <span class="comment">// Last &quot;element&quot; is a stopper</span></div>
<div class="line"><a name="l00556"></a><span class="lineno">  556</span>&#160;                    bwrite&lt;EdgeDataType&gt;(ef, ebuf, ebufptr, EdgeDataType(edge.value));</div>
<div class="line"><a name="l00557"></a><span class="lineno">  557</span>&#160;                  </div>
<div class="line"><a name="l00558"></a><span class="lineno">  558</span>&#160;                    <span class="keywordflow">if</span> ((edge.src != curvid)) {</div>
<div class="line"><a name="l00559"></a><span class="lineno">  559</span>&#160;                        <span class="comment">// New vertex</span></div>
<div class="line"><a name="l00560"></a><span class="lineno">  560</span>&#160;                        <span class="keywordtype">size_t</span> count = i - istart;</div>
<div class="line"><a name="l00561"></a><span class="lineno">  561</span>&#160;                        assert(count&gt;0 || curvid==0);</div>
<div class="line"><a name="l00562"></a><span class="lineno">  562</span>&#160;                        <span class="keywordflow">if</span> (count&gt;0) {</div>
<div class="line"><a name="l00563"></a><span class="lineno">  563</span>&#160;                            <span class="keywordflow">if</span> (count &lt; 255) {</div>
<div class="line"><a name="l00564"></a><span class="lineno">  564</span>&#160;                                uint8_t x = (uint8_t)count;</div>
<div class="line"><a name="l00565"></a><span class="lineno">  565</span>&#160;                                bwrite&lt;uint8_t&gt;(f, buf, bufptr, x);</div>
<div class="line"><a name="l00566"></a><span class="lineno">  566</span>&#160;                            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00567"></a><span class="lineno">  567</span>&#160;                                bwrite&lt;uint8_t&gt;(f, buf, bufptr, 0xff);</div>
<div class="line"><a name="l00568"></a><span class="lineno">  568</span>&#160;                                bwrite&lt;uint32_t&gt;(f, buf, bufptr,(uint32_t)count);</div>
<div class="line"><a name="l00569"></a><span class="lineno">  569</span>&#160;                            }</div>
<div class="line"><a name="l00570"></a><span class="lineno">  570</span>&#160;                        }</div>
<div class="line"><a name="l00571"></a><span class="lineno">  571</span>&#160;                        </div>
<div class="line"><a name="l00572"></a><span class="lineno">  572</span>&#160;                        <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> j=istart; j&lt;i; j++) {</div>
<div class="line"><a name="l00573"></a><span class="lineno">  573</span>&#160;                            <a class="code" href="classgraphchi_1_1sharder.html#ae57e42f648104bf6b6ee23d7cf957696">bwrite</a>(f, buf, bufptr,  shovelbuf[j].dst);</div>
<div class="line"><a name="l00574"></a><span class="lineno">  574</span>&#160;                        }</div>
<div class="line"><a name="l00575"></a><span class="lineno">  575</span>&#160;                        </div>
<div class="line"><a name="l00576"></a><span class="lineno">  576</span>&#160;                        istart = i;</div>
<div class="line"><a name="l00577"></a><span class="lineno">  577</span>&#160;                        </div>
<div class="line"><a name="l00578"></a><span class="lineno">  578</span>&#160;                        <span class="comment">// Handle zeros</span></div>
<div class="line"><a name="l00579"></a><span class="lineno">  579</span>&#160;                        <span class="keywordflow">if</span> (!edge.stopper()) {</div>
<div class="line"><a name="l00580"></a><span class="lineno">  580</span>&#160;                            <span class="keywordflow">if</span> (edge.src - curvid &gt; 1 || (i == 0 &amp;&amp; edge.src&gt;0)) {</div>
<div class="line"><a name="l00581"></a><span class="lineno">  581</span>&#160;                                <span class="keywordtype">int</span> nz = edge.src-curvid-1;</div>
<div class="line"><a name="l00582"></a><span class="lineno">  582</span>&#160;                                <span class="keywordflow">if</span> (i == 0 &amp;&amp; edge.src&gt;0) nz = edge.src; <span class="comment">// border case with the first one</span></div>
<div class="line"><a name="l00583"></a><span class="lineno">  583</span>&#160;                                <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00584"></a><span class="lineno">  584</span>&#160;                                    bwrite&lt;uint8_t&gt;(f, buf, bufptr, 0);</div>
<div class="line"><a name="l00585"></a><span class="lineno">  585</span>&#160;                                    nz--;</div>
<div class="line"><a name="l00586"></a><span class="lineno">  586</span>&#160;                                    <span class="keywordtype">int</span> tnz = std::min(254, nz);</div>
<div class="line"><a name="l00587"></a><span class="lineno">  587</span>&#160;                                    bwrite&lt;uint8_t&gt;(f, buf, bufptr, (uint8_t) tnz);</div>
<div class="line"><a name="l00588"></a><span class="lineno">  588</span>&#160;                                    nz -= tnz;</div>
<div class="line"><a name="l00589"></a><span class="lineno">  589</span>&#160;                                } <span class="keywordflow">while</span> (nz&gt;0);</div>
<div class="line"><a name="l00590"></a><span class="lineno">  590</span>&#160;                            }</div>
<div class="line"><a name="l00591"></a><span class="lineno">  591</span>&#160;                        }</div>
<div class="line"><a name="l00592"></a><span class="lineno">  592</span>&#160;                        curvid = edge.src;</div>
<div class="line"><a name="l00593"></a><span class="lineno">  593</span>&#160;                    }</div>
<div class="line"><a name="l00594"></a><span class="lineno">  594</span>&#160;                }</div>
<div class="line"><a name="l00595"></a><span class="lineno">  595</span>&#160;                </div>
<div class="line"><a name="l00596"></a><span class="lineno">  596</span>&#160;                <span class="comment">/* Flush buffers and free memory */</span></div>
<div class="line"><a name="l00597"></a><span class="lineno">  597</span>&#160;                writea(f, buf, bufptr - buf);</div>
<div class="line"><a name="l00598"></a><span class="lineno">  598</span>&#160;                free(buf);</div>
<div class="line"><a name="l00599"></a><span class="lineno">  599</span>&#160;                free(shovelbuf);</div>
<div class="line"><a name="l00600"></a><span class="lineno">  600</span>&#160;                close(f);</div>
<div class="line"><a name="l00601"></a><span class="lineno">  601</span>&#160;                close(shovelf);</div>
<div class="line"><a name="l00602"></a><span class="lineno">  602</span>&#160;                </div>
<div class="line"><a name="l00603"></a><span class="lineno">  603</span>&#160;                writea(ef, ebuf, ebufptr - ebuf);</div>
<div class="line"><a name="l00604"></a><span class="lineno">  604</span>&#160;                close(ef);</div>
<div class="line"><a name="l00605"></a><span class="lineno">  605</span>&#160;                </div>
<div class="line"><a name="l00606"></a><span class="lineno">  606</span>&#160;                free(ebuf);</div>
<div class="line"><a name="l00607"></a><span class="lineno">  607</span>&#160;                <span class="keyword">remove</span>(shovelfname.c_str()); </div>
<div class="line"><a name="l00608"></a><span class="lineno">  608</span>&#160;                </div>
<div class="line"><a name="l00609"></a><span class="lineno">  609</span>&#160;            }</div>
<div class="line"><a name="l00610"></a><span class="lineno">  610</span>&#160;            </div>
<div class="line"><a name="l00611"></a><span class="lineno">  611</span>&#160;            create_degree_file();</div>
<div class="line"><a name="l00612"></a><span class="lineno">  612</span>&#160;        }</div>
<div class="line"><a name="l00613"></a><span class="lineno">  613</span>&#160;        </div>
<div class="line"><a name="l00614"></a><span class="lineno">  614</span>&#160;        </div>
<div class="line"><a name="l00615"></a><span class="lineno">  615</span>&#160;        <span class="keyword">typedef</span> <span class="keywordtype">char</span> dummy_t;</div>
<div class="line"><a name="l00616"></a><span class="lineno">  616</span>&#160;</div>
<div class="line"><a name="l00617"></a><span class="lineno">  617</span>&#160;        <span class="keyword">typedef</span> <a class="code" href="classgraphchi_1_1sliding__shard.html">sliding_shard&lt;int, dummy_t&gt;</a> slidingshard_t;</div>
<div class="line"><a name="l00618"></a><span class="lineno">  618</span>&#160;        <span class="keyword">typedef</span> <a class="code" href="classgraphchi_1_1memory__shard.html">memory_shard&lt;int, dummy_t&gt;</a> memshard_t;</div>
<div class="line"><a name="l00619"></a><span class="lineno">  619</span>&#160;</div>
<div class="line"><a name="l00620"></a><span class="lineno">  620</span>&#160;        </div>
<div class="line"><a name="l00621"></a><span class="lineno">  621</span>&#160;        <span class="keywordtype">void</span> create_degree_file() {</div>
<div class="line"><a name="l00622"></a><span class="lineno">  622</span>&#160;            <span class="comment">// Initialize IO</span></div>
<div class="line"><a name="l00623"></a><span class="lineno">  623</span>&#160;            <a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> * iomgr = <span class="keyword">new</span> <a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a>(m);</div>
<div class="line"><a name="l00624"></a><span class="lineno">  624</span>&#160;            std::vector&lt;slidingshard_t * &gt; sliding_shards;</div>
<div class="line"><a name="l00625"></a><span class="lineno">  625</span>&#160;            </div>
<div class="line"><a name="l00626"></a><span class="lineno">  626</span>&#160;            <span class="keywordtype">int</span> subwindow = 5000000;</div>
<div class="line"><a name="l00627"></a><span class="lineno">  627</span>&#160;            std::cout &lt;&lt; <span class="stringliteral">&quot;Subwindow : &quot;</span> &lt;&lt; subwindow &lt;&lt; std::endl;</div>
<div class="line"><a name="l00628"></a><span class="lineno">  628</span>&#160;            m.set(<span class="stringliteral">&quot;subwindow&quot;</span>, (<span class="keywordtype">size_t</span>)subwindow);</div>
<div class="line"><a name="l00629"></a><span class="lineno">  629</span>&#160;            </div>
<div class="line"><a name="l00630"></a><span class="lineno">  630</span>&#160;            <span class="keywordtype">int</span> loadthreads = 4;</div>
<div class="line"><a name="l00631"></a><span class="lineno">  631</span>&#160;            </div>
<div class="line"><a name="l00632"></a><span class="lineno">  632</span>&#160;            m.start_time(<span class="stringliteral">&quot;degrees.runtime&quot;</span>);</div>
<div class="line"><a name="l00633"></a><span class="lineno">  633</span>&#160;            </div>
<div class="line"><a name="l00634"></a><span class="lineno">  634</span>&#160;            <span class="comment">/* Initialize streaming shards */</span></div>
<div class="line"><a name="l00635"></a><span class="lineno">  635</span>&#160;            <span class="keywordtype">int</span> blocksize = get_option_int(<span class="stringliteral">&quot;blocksize&quot;</span>, 1024 * 1024);</div>
<div class="line"><a name="l00636"></a><span class="lineno">  636</span>&#160;            </div>
<div class="line"><a name="l00637"></a><span class="lineno">  637</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> p=0; p &lt; nshards; p++) {</div>
<div class="line"><a name="l00638"></a><span class="lineno">  638</span>&#160;                std::cout &lt;&lt; <span class="stringliteral">&quot;Initialize streaming shard: &quot;</span> &lt;&lt; p &lt;&lt; std::endl;</div>
<div class="line"><a name="l00639"></a><span class="lineno">  639</span>&#160;                sliding_shards.push_back(</div>
<div class="line"><a name="l00640"></a><span class="lineno">  640</span>&#160;                                        <span class="keyword">new</span> slidingshard_t(iomgr, filename_shard_edata&lt;EdgeDataType&gt;(basefilename, p, nshards), </div>
<div class="line"><a name="l00641"></a><span class="lineno">  641</span>&#160;                                                           filename_shard_adj(basefilename, p, nshards), intervals[p].first, </div>
<div class="line"><a name="l00642"></a><span class="lineno">  642</span>&#160;                                                           intervals[p].second, </div>
<div class="line"><a name="l00643"></a><span class="lineno">  643</span>&#160;                                                           blocksize, m, <span class="keyword">true</span>));</div>
<div class="line"><a name="l00644"></a><span class="lineno">  644</span>&#160;            }</div>
<div class="line"><a name="l00645"></a><span class="lineno">  645</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> p=0; p &lt; nshards; p++) sliding_shards[p]-&gt;only_adjacency = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00646"></a><span class="lineno">  646</span>&#160;            </div>
<div class="line"><a name="l00647"></a><span class="lineno">  647</span>&#160;            graphchi_context ginfo;</div>
<div class="line"><a name="l00648"></a><span class="lineno">  648</span>&#160;            ginfo.nvertices = 1 + intervals[nshards - 1].second;</div>
<div class="line"><a name="l00649"></a><span class="lineno">  649</span>&#160;            ginfo.scheduler = NULL;</div>
<div class="line"><a name="l00650"></a><span class="lineno">  650</span>&#160;            </div>
<div class="line"><a name="l00651"></a><span class="lineno">  651</span>&#160;            </div>
<div class="line"><a name="l00652"></a><span class="lineno">  652</span>&#160;            std::string outputfname = filename_degree_data(basefilename);</div>
<div class="line"><a name="l00653"></a><span class="lineno">  653</span>&#160;            </div>
<div class="line"><a name="l00654"></a><span class="lineno">  654</span>&#160;            <span class="keywordtype">int</span> degreeOutF = open(outputfname.c_str(), O_RDWR | O_CREAT, S_IROTH | S_IWOTH | S_IWUSR | S_IRUSR);</div>
<div class="line"><a name="l00655"></a><span class="lineno">  655</span>&#160;            <span class="keywordflow">if</span> (degreeOutF &lt; 0) {</div>
<div class="line"><a name="l00656"></a><span class="lineno">  656</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aced66975c154ea0e2a8ec3bc818b4e08">LOG_ERROR</a>) &lt;&lt; <span class="stringliteral">&quot;Could not create: &quot;</span> &lt;&lt; degreeOutF &lt;&lt; std::endl;</div>
<div class="line"><a name="l00657"></a><span class="lineno">  657</span>&#160;            }</div>
<div class="line"><a name="l00658"></a><span class="lineno">  658</span>&#160;            assert(degreeOutF &gt;= 0);</div>
<div class="line"><a name="l00659"></a><span class="lineno">  659</span>&#160;            <span class="keywordtype">int</span> trerr = ftruncate(degreeOutF, ginfo.nvertices * <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) * 2);</div>
<div class="line"><a name="l00660"></a><span class="lineno">  660</span>&#160;            assert(trerr == 0);</div>
<div class="line"><a name="l00661"></a><span class="lineno">  661</span>&#160;            </div>
<div class="line"><a name="l00662"></a><span class="lineno">  662</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> window=0; window&lt;nshards; window++) {</div>
<div class="line"><a name="l00663"></a><span class="lineno">  663</span>&#160;                metrics_entry mwi = m.start_time();</div>
<div class="line"><a name="l00664"></a><span class="lineno">  664</span>&#160;                </div>
<div class="line"><a name="l00665"></a><span class="lineno">  665</span>&#160;                vid_t interval_st = intervals[window].first;</div>
<div class="line"><a name="l00666"></a><span class="lineno">  666</span>&#160;                vid_t interval_en = intervals[window].second;</div>
<div class="line"><a name="l00667"></a><span class="lineno">  667</span>&#160;                </div>
<div class="line"><a name="l00668"></a><span class="lineno">  668</span>&#160;                <span class="comment">/* Flush stream shard for the window */</span></div>
<div class="line"><a name="l00669"></a><span class="lineno">  669</span>&#160;                sliding_shards[window]-&gt;flush();</div>
<div class="line"><a name="l00670"></a><span class="lineno">  670</span>&#160;                </div>
<div class="line"><a name="l00671"></a><span class="lineno">  671</span>&#160;                <span class="comment">/* Load shard[window] into memory */</span></div>
<div class="line"><a name="l00672"></a><span class="lineno">  672</span>&#160;                memshard_t memshard(iomgr, filename_shard_edata&lt;EdgeDataType&gt;(basefilename, window, nshards), filename_shard_adj(basefilename, window, nshards),</div>
<div class="line"><a name="l00673"></a><span class="lineno">  673</span>&#160;                                              interval_st, interval_en, m);</div>
<div class="line"><a name="l00674"></a><span class="lineno">  674</span>&#160;                memshard.only_adjacency = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00675"></a><span class="lineno">  675</span>&#160;                logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;Interval: &quot;</span> &lt;&lt; interval_st &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; interval_en &lt;&lt; std::endl;</div>
<div class="line"><a name="l00676"></a><span class="lineno">  676</span>&#160;                </div>
<div class="line"><a name="l00677"></a><span class="lineno">  677</span>&#160;                <span class="keywordflow">for</span>(vid_t subinterval_st=interval_st; subinterval_st &lt; interval_en; ) {</div>
<div class="line"><a name="l00678"></a><span class="lineno">  678</span>&#160;                    vid_t subinterval_en = std::min(interval_en, subinterval_st + subwindow);</div>
<div class="line"><a name="l00679"></a><span class="lineno">  679</span>&#160;                    logstream(<a class="code" href="logger_8hpp.html#aeb4f36db01bd128c7afeac5889dac311">LOG_INFO</a>) &lt;&lt; <span class="stringliteral">&quot;(Degree proc.) Sub-window: [&quot;</span> &lt;&lt; subinterval_st &lt;&lt; <span class="stringliteral">&quot; - &quot;</span> &lt;&lt; subinterval_en &lt;&lt; <span class="stringliteral">&quot;]&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a name="l00680"></a><span class="lineno">  680</span>&#160;                    assert(subinterval_en &gt;= subinterval_st &amp;&amp; subinterval_en &lt;= interval_en);</div>
<div class="line"><a name="l00681"></a><span class="lineno">  681</span>&#160;                                        </div>
<div class="line"><a name="l00682"></a><span class="lineno">  682</span>&#160;                    <span class="comment">/* Preallocate vertices */</span></div>
<div class="line"><a name="l00683"></a><span class="lineno">  683</span>&#160;                    metrics_entry men = m.start_time();</div>
<div class="line"><a name="l00684"></a><span class="lineno">  684</span>&#160;                    <span class="keywordtype">int</span> nvertices = subinterval_en-subinterval_st+1;</div>
<div class="line"><a name="l00685"></a><span class="lineno">  685</span>&#160;                    std::vector&lt; graphchi_vertex&lt;int, dummy_t&gt; &gt; vertices(nvertices, graphchi_vertex&lt;int, dummy_t&gt;()); <span class="comment">// preallocate</span></div>
<div class="line"><a name="l00686"></a><span class="lineno">  686</span>&#160;                    </div>
<div class="line"><a name="l00687"></a><span class="lineno">  687</span>&#160;                    </div>
<div class="line"><a name="l00688"></a><span class="lineno">  688</span>&#160;                    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i &lt; nvertices; i++) {</div>
<div class="line"><a name="l00689"></a><span class="lineno">  689</span>&#160;                        vertices[i] = graphchi_vertex&lt;int, dummy_t&gt;(subinterval_st + i, NULL, NULL, 0, 0);</div>
<div class="line"><a name="l00690"></a><span class="lineno">  690</span>&#160;                        vertices[i].scheduled =  <span class="keyword">true</span>;</div>
<div class="line"><a name="l00691"></a><span class="lineno">  691</span>&#160;                    } </div>
<div class="line"><a name="l00692"></a><span class="lineno">  692</span>&#160;                    </div>
<div class="line"><a name="l00693"></a><span class="lineno">  693</span>&#160;                    metrics_entry me = m.start_time();</div>
<div class="line"><a name="l00694"></a><span class="lineno">  694</span>&#160;                    omp_set_num_threads(loadthreads);</div>
<div class="line"><a name="l00695"></a><span class="lineno">  695</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00696"></a><span class="lineno">  696</span>&#160;<span class="preprocessor"></span>                    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> p=-1; p &lt; nshards; p++)  {</div>
<div class="line"><a name="l00697"></a><span class="lineno">  697</span>&#160;                        <span class="keywordflow">if</span> (p == (-1)) {</div>
<div class="line"><a name="l00698"></a><span class="lineno">  698</span>&#160;                            <span class="comment">// if first window, now need to load the memshard</span></div>
<div class="line"><a name="l00699"></a><span class="lineno">  699</span>&#160;                            <span class="keywordflow">if</span> (memshard.loaded() == <span class="keyword">false</span>) {</div>
<div class="line"><a name="l00700"></a><span class="lineno">  700</span>&#160;                                memshard.load();</div>
<div class="line"><a name="l00701"></a><span class="lineno">  701</span>&#160;                            }</div>
<div class="line"><a name="l00702"></a><span class="lineno">  702</span>&#160;                            </div>
<div class="line"><a name="l00703"></a><span class="lineno">  703</span>&#160;                            <span class="comment">/* Load vertices from memshard (only inedges for now so can be done in parallel) */</span></div>
<div class="line"><a name="l00704"></a><span class="lineno">  704</span>&#160;                            memshard.load_vertices(subinterval_st, subinterval_en, vertices);</div>
<div class="line"><a name="l00705"></a><span class="lineno">  705</span>&#160;                        } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00706"></a><span class="lineno">  706</span>&#160;                            <span class="comment">/* Stream forward other than the window partition */</span></div>
<div class="line"><a name="l00707"></a><span class="lineno">  707</span>&#160;                            <span class="keywordflow">if</span> (p != window) {</div>
<div class="line"><a name="l00708"></a><span class="lineno">  708</span>&#160;                                sliding_shards[p]-&gt;read_next_vertices(nvertices, subinterval_st, vertices, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00709"></a><span class="lineno">  709</span>&#160;                            }</div>
<div class="line"><a name="l00710"></a><span class="lineno">  710</span>&#160;                        }</div>
<div class="line"><a name="l00711"></a><span class="lineno">  711</span>&#160;                    }</div>
<div class="line"><a name="l00712"></a><span class="lineno">  712</span>&#160;                    </div>
<div class="line"><a name="l00713"></a><span class="lineno">  713</span>&#160;                    m.stop_time(me, <span class="stringliteral">&quot;stream_ahead&quot;</span>, window,  <span class="keyword">true</span>);  </div>
<div class="line"><a name="l00714"></a><span class="lineno">  714</span>&#160;                    </div>
<div class="line"><a name="l00715"></a><span class="lineno">  715</span>&#160;                    </div>
<div class="line"><a name="l00716"></a><span class="lineno">  716</span>&#160;                    metrics_entry mev = m.start_time();</div>
<div class="line"><a name="l00717"></a><span class="lineno">  717</span>&#160;                    <span class="comment">// Read first current values</span></div>
<div class="line"><a name="l00718"></a><span class="lineno">  718</span>&#160;                    </div>
<div class="line"><a name="l00719"></a><span class="lineno">  719</span>&#160;                    <span class="keywordtype">int</span> * vbuf = (<span class="keywordtype">int</span>*) malloc(nvertices*<span class="keyword">sizeof</span>(<span class="keywordtype">int</span>)*2);</div>
<div class="line"><a name="l00720"></a><span class="lineno">  720</span>&#160;                    </div>
<div class="line"><a name="l00721"></a><span class="lineno">  721</span>&#160;                    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;nvertices; i++) {</div>
<div class="line"><a name="l00722"></a><span class="lineno">  722</span>&#160;                        vbuf[2 * i] = vertices[i].num_inedges();</div>
<div class="line"><a name="l00723"></a><span class="lineno">  723</span>&#160;                        vbuf[2 * i +1] = vertices[i].num_outedges();</div>
<div class="line"><a name="l00724"></a><span class="lineno">  724</span>&#160;                    }</div>
<div class="line"><a name="l00725"></a><span class="lineno">  725</span>&#160;                    pwritea(degreeOutF, vbuf, nvertices * <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) * 2, subinterval_st * <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) * 2);</div>
<div class="line"><a name="l00726"></a><span class="lineno">  726</span>&#160;                    </div>
<div class="line"><a name="l00727"></a><span class="lineno">  727</span>&#160;                    free(vbuf);</div>
<div class="line"><a name="l00728"></a><span class="lineno">  728</span>&#160;                    </div>
<div class="line"><a name="l00729"></a><span class="lineno">  729</span>&#160;                    <span class="comment">// Move window</span></div>
<div class="line"><a name="l00730"></a><span class="lineno">  730</span>&#160;                    subinterval_st = subinterval_en+1;</div>
<div class="line"><a name="l00731"></a><span class="lineno">  731</span>&#160;                }</div>
<div class="line"><a name="l00732"></a><span class="lineno">  732</span>&#160;                <span class="comment">/* Move the offset of the window-shard forward */</span></div>
<div class="line"><a name="l00733"></a><span class="lineno">  733</span>&#160;                sliding_shards[window]-&gt;set_offset(memshard.offset_for_stream_cont(), memshard.offset_vid_for_stream_cont(),</div>
<div class="line"><a name="l00734"></a><span class="lineno">  734</span>&#160;                                                  memshard.edata_ptr_for_stream_cont());   </div>
<div class="line"><a name="l00735"></a><span class="lineno">  735</span>&#160;            }</div>
<div class="line"><a name="l00736"></a><span class="lineno">  736</span>&#160;            close(degreeOutF);</div>
<div class="line"><a name="l00737"></a><span class="lineno">  737</span>&#160;            m.stop_time(<span class="stringliteral">&quot;degrees.runtime&quot;</span>);</div>
<div class="line"><a name="l00738"></a><span class="lineno">  738</span>&#160;            <span class="keyword">delete</span> iomgr;</div>
<div class="line"><a name="l00739"></a><span class="lineno">  739</span>&#160;        }</div>
<div class="line"><a name="l00740"></a><span class="lineno">  740</span>&#160;</div>
<div class="line"><a name="l00741"></a><span class="lineno">  741</span>&#160;</div>
<div class="line"><a name="l00742"></a><span class="lineno">  742</span>&#160;    }; <span class="comment">// End class sharder</span></div>
<div class="line"><a name="l00743"></a><span class="lineno">  743</span>&#160;   </div>
<div class="line"><a name="l00744"></a><span class="lineno">  744</span>&#160;}; <span class="comment">// namespace</span></div>
<div class="line"><a name="l00745"></a><span class="lineno">  745</span>&#160;</div>
<div class="line"><a name="l00746"></a><span class="lineno">  746</span>&#160;</div>
<div class="line"><a name="l00747"></a><span class="lineno">  747</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00748"></a><span class="lineno">  748</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00749"></a><span class="lineno">  749</span>&#160;</div>
<div class="line"><a name="l00750"></a><span class="lineno">  750</span>&#160;</div>
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